AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which RNA bases would pair with GGG CCC in transcription?
A
CCC GGG
B
GGG CCC
C
AAA UUU
D
UUU AAA
Explanation: 

Detailed explanation-1: -Transcription: DNA to mRNA DNA and RNA bases are also held together by chemical bonds and have specific base pairing rules. In DNA/RNA base pairing, adenine (A) pairs with uracil (U), and cytosine (C) pairs with guanine (G).

Detailed explanation-2: -This leads to a total of 10 codons in the mRNA sequence AUGGCAGUGCCA as AUG, UGG, GGC, GCA, CAG, AGU, GUG, UGC, GCC, CCA.

Detailed explanation-3: -In mRNA, bases are present in a group of three called the genetic codes.

Detailed explanation-4: -Expert-Verified Answer The synthesised mRNA will have base sequence complementary to the template strand of the DNA. This complementarity is useful for synthesis of correct sequence of amino acids. Hence, for the given DNA sequence-‘C-A-A-G-G-T’, the correct mRNA sequence will be ‘G-U-U-C-C-A’.

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